What term to use to show / hide pre-filled fields in a form?

We have a form that is about 70% pre-filled. However, in between the pre-filled input boxes, there are a few ones that needs to be filled-out manually.

However, when we show the form, we only want the person to fill in the few ones in between that need to be filled (empty input boxes) and hide the pre-filled ones so that the user doesn't need to scroll through a long form. The pre-filled items are also most likely to be correct (populated from an existing record in database).

The problem is, we still like the user to be able to see the form in its entirety in the event that one of the pre-filled items need to be changed.

Am thinking of a button / link somewhere to say "Show / Hide pre-filled items", which will then expand / contract, depending on the user's needs.

Prefilled Hidden:

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Prefilled Shown:

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Of course, the form is longer but the above is just to demonstrate the concept. I am wondering if the term for "show / hide" is correct / clear enough or is there a better way to phrase it?

Or is there another way to do this?

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